Pump



C. R. SESSIONS.

PUMP.

APPLICATION FILED DEC.6. 1920.

Patented Sept. 5, 1922.

vvlll ture and thepump runner.

Patented Sept. 5, 1922.

UNITED STATES PATENT orrlca.

PUMP.

Application flledvlbecember e, 1920. seml naeaenas.

To allwiiomitmay concern: Be it known that I, CHARLES R. SESSIONS, a citizenof the United States, residing at San Francisco, in the city and county of San Francisco, State of California, have invented a new and useful Pump, of which the following is a specification in such full and clear terms as will enable ,those skilled in the art to construct and use the same.

This invention relates to a pump and an object of the invention is to provide means whereby the pump runner will be held perfectly true in the position it, should occupy.

Another object of the invention is to provide a pump which may be immersed to a considerable depth in water without injury to the motor driving the runner. V

A further object of the invention, is to provide a closely adjustable, self lubricating, low friction combined radial and thrust bearing for the support of the motor arma- A further object of the invention is to produce an apparatus in which the motor will be cooled by having the stator lamina.- tions in contact with the water passing through the pump and by having the rotor laminations in contact with a rotating tub'u'-- larmember which isa part of the pump run ner, and which is cooled at one endby the water passing through said runner and at the other end by the. water in contact with the shaft supporting. said tubular member. A further object of the invention is to simplify the construction of the apparatus'by the use of an outer shell in the place of bolts through the structure of the motor to hold the upper casing and other partswof the pump and motor together so thatf lo'nger or shorter motor may be used wit the same upper and lower parts. 15;-

1 A further object of the in ention' is to produce an apparatus in which the motor diameter will be as large as possible, for a given limiting outside diameter, this being accomplished by the use of a relatively thin outer Shell for connecting the parts of the motor together and by passing the water directly inside the shell and against the outside of the stator laminations.

A further object of the invention is to simplify and cheapen manufacture by pro the motor.

ducing a construction that can be standardized for a large range of motor and pump capacities. I

A further object of the invention is to produce an apparatus in which the water which by-passes through. the hub clearance W111. be aminimum thereby increasing the efficiency of the pump. c. A further object of the invention is to produce a packing for the runner hubs that because of its self-aligning feature and because of its long life and'low friction may be made a very close fit on the hub thus materlally reducing the clearance ordinarily employed.

A further object of the invention is to provide means for continuously or intermittently'supplying compressed air or oil from the surface of the ground to the motor chamber, at or below the water'level in this chamber in order to maintain a supply of air or oil and prevent the water from reaching A further object of the invention is to pro duce'a construction in which the entire motor chamber may be completely filled with il to provide another method of excluding the water' from the motor and be a further aid-to cooling the motor.

a further object of the invention is to provide'm'eans to prevent the water that passed over the outside of the stator laminations froniett ing into the coils of the motor, a suitab e thin covering being used to exclude the water. This covering will be of such material and .so arranged as to be a good heat conductor; 4

"A further object of the invention is to provide suitable packing at the joints of the stator with the upper and lower casing to insure against water passing into the motor casing.

Another object of the invention is to provide means for allowing the packing on the suction side of the runnerto be lined up by the runner hub rather than by the casing which holds it, the runner and motor. being supported independently of the packing.

A further object of the invention is to provide the chamber below the motor with suitable balfle plates to prevent the oil or water in the chamber from whirling.

Another object of the invention is to provide a packing ring for the runner hub which will be selflubricating because of the aherent property of water to lubricate rub- While but a single motor and a single runner has been shown it will be apparent that a plurality of runners or motors may be used instead of the single runner and single motorwithout changing the invention.

Other objects of the invention will appear as the description proceeds.

An embodiment of the invention is shown in the acompanying drawings in which the same reference numeral is applied to the same portion throughout, but I am aware that there may be modifications thereof.

Fi ure 1 is a vertical sectional view through the pump, only about one-half of the pump being shown;

Fig. 2 is a seotinoal view of a portion of the pump showing the manner of packing one of the joints.

Fig. 3 is a side elevation of a modified form of the pump, a portion being shown in section for purposes of illustration.

Fig. 4 is a sectional view of a modified form of runner packing.

This pump is of the electrically driven type in which a suitable runner is directly operated by the armature of the motor. A bottom portion 7, a ring 10, a lower motor casing 16, the motor stator l and an upper discharge portion or hood 8 are secured together by suitable stresses applied through the shell 9.

In the hood 8 there is secured a tube 36 through which the electrical connections 1, 2

' and 3 extend to the motor windings, said wires extending to the fixed field coils 4 which may be wound to receive any desired current, but which particular form of windings forms no part of the present invention.

' At the bottom there is an intake pipe 5 and at the top an outlet pipe 6. The inlet pipe isconnected to the bottom casting 7 y suitable flanges and bolts while the outlet pipe 6- is suitably connected to the top casting 8.

A ring 10 is suitably welded or otherwise connected to the bottom of the shell 9 the welding being indicated at 11; This ring is provided with a plurality of guide vanes 12 and is connected to the flange 13 in the bottom casting 7 by means of a plurality of bolts 14.

The guide vanes 12 are intended to seat against a projecting rib 15 of the lower 'motor casing 16 to hold the parts of the apparatus together; The motor casing 16 has an upturned flange at 17 to produce a receptacle for the retention ofoil that may be used in the interior of the motor chamber.

The object of placing oil in the pocket formed by the flange 17 is to provide an oil cover for any water passing into the motor chamber therebypreventing the absorption of any air from said chamber. This casing has bafile plates 16' carrying a ring 16 around the shaft and tube 24L. The ring 16 is spaced from the pump casing a short distance from the bottom to allow the water, if any, passing into the casing to pass thereunder and raise the oil from the oil retaining pocket. The function of the ring 16 is to prevent the rapidly rotating shaft 'fromthrowing a spray of water around,

and the battle plates 16' prevent the water frombeing rotated as a body.

The motor field 4 is of such size as to fit between the ribs 17 on the top of the casing 16 and downwardly projecting rib 18 of the upper casting 8 a cover 4' of a suitable water-proof material being placed outside the stator laminations and forming a gasket to prevent the access of water t the interior of the motor casing chamber.

The casting 8 has a plurality of waterways 19 and it is provided with a central opening to receive the heavy shaft 20 which extends downwardly to the bottom of the motor casing 16,.

The motor armature members 21 are supported on the tubular member 2-.l; below the lubricant retaining chamber 23, said chamber having an inturned wall 23' at the top to prevent the loss of lubricant.

The oil or lubricant chamber 23 is of relatively large capacity and provides lubricant storage for a considerable time.

The cylindrical shell 24 has a bronze or other antifriction bearing 25 at its upper portion running upon the fixed shaft 20 and it has a suitable combined radial and thrust antifriction bearing 26 whichis connected with the lower end of the shaft 20 and held in place thereon by mean of the threaded nut 27.

It is the intention to fill the tubular member with lubricant so that thetwo bearings 25 and 26 will be continually immersed in oil.

At the lower end of the tubular member 2 1 the pump runner- 33 is secured thereto by suitable means.

At the upper end of the shell 9 there is a ring 28 which is secured to the shell by a plurality of screws 29, or other means, while the space 30 between the ring and bottom of the recess in the casting 8 in which the ring seats is filled with a suitable packing of cement through the opening in which one of the screws is placed.

When the apparatus is assembled the headless set screws may be left loose. the ring 28 will then be placed in position whereupon the screws 14 may be completely tightened thereby drawing the motor parts together and dispensing with any bolts for vent its rotating with therunner hub and to prevent its being thrust out by the pressure in the hub clearance. The ring 35 is made watertight in the casting 7 by means of cement forced in through. the hole, which hole is afterwards closed by the plug 35. It can be seen that the ring and packing therefore take thealignment of the runner hub ratherthan of the recess in casting 7.

In order to providefor the addition of air to the motor chamber, there is a pipe 38 which leads to the surface. and it is connected to a suitable air compressor 38', either air or oil being capable of being forced through this pipe into the pump. At the end of the pipe 38 there may be a valve so controlled by a float 38" or other means as to automatically admit air from a storage tank on the surface of the ground to the motor chamber as the water may rise above a certain level closing again when it falls below this level. The object of providing means to admit air to the motor chamber. is to replace possible absorption of air by the liquid or to replace accidental losses of air in the motor chamber.

In Fig. 2 there is shown a modified form of packing for the upper end of the shell 9.

In this form of the invention the outer casting is indicated at 40 the outer shell at 41 the ring at 42 and a packing strip at 43. The ring 42 is connected to the shell by means of a suitable number of screws 44 and bearing upon the top of the packing strip 43 is an annular angle 45 which has suflicient movement with respect "to the seat in the groove of the casting 40 to allow of wedging the packing 43 against the shell '41 with suflicient force to prevent the leakage of water at that point.

In the form of the invention shown in Fig. 3 the motor casing is intended to be completely filled with oil andthe runner is soshaped with respect to the lower portion of the motor casing as to provide a trap to prevent air from passing into the motor casing and displacing the oil placed therein.

In this form of the invention the outer shell is indicated at 51. It holds the essential parts of the pump together in substantiall the same way as in the previous form of the invention. The motor armature 53 is mounted on the tube 55 revoluble on the fixed shaft 54. The runner 56 is inclined upwardly and the lower portion of the casing 57 is similarly inclined so that a ring flange 58 is produced adjacent the tube 55.

In this particular form of the invention the entire motor chamber is intended to be filled with oil to exclude air and water from the interior of the motor casing, the bafile plate being shown at 57'. The result of inclining the bottom of the oil retaining pocket is to make a liquid trap so as to seal the space between the tube 55 and flange 58 and thereby prevent any air from passing from the outside of the casing to the inside of the same.

In the form of the invention shown in Fig.- 4 the bottom casting is indicated at 60' and, the hub portion of the lower part of the runner at 61. Secured to the casting 60 is a vulcanized rubber ring 62, said ring having a. fiat flexible pure rubber flange 63 which is held in place by means of a metal ring 64 and screws 65.

Surrounding the runner 61 is a metal ring 66 which ring is suitably engaged with the casting 60 to prevent it from rotating by means of recesses and lugs at 67.

The advantage of the foregoing construction is that the rubber packing ring 62 and ring 66 will adjust themselves to any slight lack of alignment of the runner with the casing in the assembly of the pumpand to any slight movement of the runner when it is in operation.

What I claim is as follows, but various modificationsmay be made in the construction shown in the drawings and aboveparticularly described form, within the purview of my invention.

1. A rotary pump comprising a pump casing containing a stator and having discharge passageways outside the latter, a shaft supported by the casing, a} tubular member bearing on the shaft, a rotor and a pump runner carried by said tubular member, the runner discharging its fluid through the passageways outside the stator.

2. A rotary pump comprising a pump casing carrying a supporting shaft, a stator, a tubular member upon said shaft and bearing thereon, a rotor carried by said tubular member and a pump runner carried by said tubular member, the casing having liquid discharge passageways outside the stator.

3. A rotary pump comprising a cylindrical shell, a stator held in place thereby, a fixed shaft connected to the cylindrical shell and extending through the stator, a tubular member surrounding said shaft and bearing upon the same, a rotor carried by the tubular member adjacent the stator and a pump runner carried by the tubular member at one end thereof, the casing having liquid discharge pamageways from the pump runner outside the stator.

4. A rotary pump comprising a cylindrical shell, a stator held in position within the shell, a fixed shaft connected to one end of said shell and extending axially through the stator, a tubular member bearlng upon said shaft in two places, an oil retaining chamber formed at the top of said tubular member, a rotor carried by said tubular member and a pump runner carried by said tubular member'adjacent one end of the fixed shaft.

5.'A rotary pump comprising a discharge head having passageways extending therethrough, a fixed shaft supported thereby, fixed motor field members, an armature, a runner carried by said armature and bearing upon said shaft and a cylindrical shell outside the motor for holding the several parts of the pump together and said shell being of such diameter as to form a discharge passageway outside the fixed motor parts.

6. A rotary pump comprising a discharge head having passageways extending therethrough, a fixed shaft carried by the discharge head, a tubular member thereon, and supported by said fixed shaft, a motor having fixed and movable parts, the movable parts being supported by said tubular member and a pump runner carried by the tubular member.

7. A rotary pump comprising a discharge head, having assageways extending therethrough, a fixed s aft carried by the discharge head, a tubular member thereon bearing on said shaft, a motor having fixed parts and movable parts carried by the tubular member, means to hold the fixed motor parts against the discharge head, a cylindrical shell for securing the parts of the pump together and for holding the fixed parts of the motor in place, a pump runner carried by the tubular member and means to supply the interior ofthe pump with air under pres sure.

8. A rotary pump comprising a casing, a fixed shaft supported thereby, a tubular member having two or more bearings on said shaft, a motor the armature of which is supported by the tubular member and a pump runner carried b the tubular member, the casing having liquid discharge passageways outside the motor.

9. A rotary pump comprising a casing having inlet and discharge passageways extending therethrough, a fixed shaft, tubular members bearing upon said fixed shaft in two-places, a motor the armature of which is carried by the tubular member, a pump runner carried by the tubular member and means to supply the pump chamber containing the motor with. air under pressure.

10. A rotary pump comprising a head having discharge passageways therethrough, a shaft carried thereby, a tubular member bearing upon said shaft in two places, a motor the armature of which is carried by the tubular member, a shell for holding the fixed parts of the motor against the dis char e head, a cylindrical shell spaced from the fixed part of the motor to form a discharge passageway around the same, a pump v runner carried by the tubular member and a series of guide vanes on the cylindrical shell adjacent the periphery of the pump runner.

11. A rotary pump comprising a casing open at one end only, a fixed shaft within the casing, a motor in the casing, a tubular driving member projecting from the casing, a pump runner carried by the driving member, and an enclosing casing forming a discharge for the water from the pump outside the motor.

12. A rotary pump comprising a casing open at one end only, a fixed shaft carried thereby a motor therein, a tubular driving member projecting from the casing, a pump runner carried by the driving member, and an enclosing shell for holding the apparatus together spaced from the first casing to form a discharge passage around the same.

13. A rotary pump comprising a casing, a motor therein, a pump runner operated thereby and means to automatically supply the casing with air under pressure when the water reaches a predetermined level in the casing.

In testimony whereof I have hereunto set my hand this 27th day of November A. D.

CHARLES R. SESSIONS. 

